心理学研究表明,儿童的认知规律是“感知—表象—概念”。而操作学具符合这一规律,能变学生被动地听为主动地学,充分调动学生的各种感官参与教学活动,去感知大量直观形象的事物,获得感性知识,形成知识的表象,并诱发学生积极探索,从事物的表象中概括出事物的本质特征,从而形成科学的概念。在教学过程中,教师若充分运用学具辅助教学,是可以优化课堂教学的。 Psychological research shows that children’s cognitive rules are “perception - appearance - concept ”. The operation of learning tools in line with this law, can change the students passively to learn to take the initiative to fully mobilize the various senses of students involved in teaching activities, to perceive a large number of visual images of things, access to perceptual knowledge, the formation of knowledge of the surface and induce students Active exploration, from the appearance of things out of the essence of the nature of things, thus forming a scientific concept. In the teaching process, if teachers make full use of learning aids to teach, it is possible to optimize classroom teaching.